Wearable electroencephalogram signal acquisition device capable of adjusting electrode array
The wearable EEG signal acquisition device with adjustable electrode array solves the problem of fixed electrode sensor position, realizes flexible adjustment and precise acquisition of electrode array, adapts to different head sizes, and improves acquisition accuracy and wearability.
Patent Information
- Application Number
- CN202422956051.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The electrode sensor positions of existing head-mounted EEG signal acquisition devices are fixed and cannot adapt to different patients' head sizes, resulting in inaccurate acquisition positions and affecting applicability.
The wearable EEG signal acquisition device, which uses an adjustable electrode array, achieves front-to-back and left-to-right position adjustment of the electrode array through the cooperation of a moving mechanism, a U-shaped slider, and an electrode array mounting mechanism. It can also adapt to different head circumferences and improve wearability through the cooperation of an adjustment strap and snaps.
It enables precise adjustment of the electrode array acquisition position, improving the accuracy of EEG signal acquisition and the applicability of the device, making it suitable for users with different head circumferences.
Smart Images
Figure CN223731412U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brain-computer interface technology, specifically to a wearable electroencephalogram (EEG) signal acquisition device with an adjustable electrode array. Background Technology
[0002] Brain-computer interface (BCI) technology aims to establish a direct information exchange and control channel between the brain and a computer (or other electromechanical equipment). It is a novel method of brain-machine communication. There are two methods for acquiring brain signals: embedded acquisition and non-embedded acquisition. Embedded acquisition involves opening the skull and implanting sensors, but this method is not suitable for everyday use. Non-embedded acquisition involves placing electrode sensors outside the cerebral cortex to collect brain signals. This method is more commonly used in EEG products and is also frequently seen in daily life. The following problems exist with existing technologies:
[0003] Because most of the electrode sensors in existing head-mounted EEG signal acquisition devices are fixed in position on the wearable structure and cannot be flexibly adjusted, they cannot adapt to different patients with different head sizes. The electrode position directly affects the reception of EEG signals, resulting in low applicability. Utility Model Content
[0004] This invention provides a wearable EEG signal acquisition device with an adjustable electrode array to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A wearable EEG signal acquisition device with an adjustable electrode array includes a wearable fabric headband. Movable mechanisms are provided on the top left and right sides of the headband. Three EEG signal acquisition mechanisms are located on the top of the two movable mechanisms. An adjustment mechanism is provided on the rear side of the headband. Each movable mechanism includes a hard plastic arc-shaped sliding plate, which is fixedly installed on the top left and right sides of the headband. Each plate has a left-right through-type limiting groove. Each of the three EEG signal acquisition mechanisms includes two U-shaped sliders, one on the left and one on the right. An electrode array mounting mechanism is located on the top of each U-shaped slider, and the sliders are slidably connected to the two hard plastic arc-shaped sliding plates.
[0007] A further improvement of this utility model is that a drag-reducing pulley is movably installed between the inner opposing surfaces of the two U-shaped sliders on the left and right sides, and the drag-reducing pulley is slidably connected to the limiting groove.
[0008] A further improvement of this utility model is that: the top of the three U-shaped sliders on the top of the hard plastic arc-shaped sliding plate on the left and right sides are provided with locking threaded holes that run vertically through each other, and the inner ring thread of the locking threaded hole is fitted with a locking threaded rod. The bottom of the locking threaded rod overlaps with the top of the hard plastic arc-shaped sliding plate, and a locking rotating rod is fixedly installed on the top of the hard plastic arc-shaped sliding plate.
[0009] A further improvement of the present invention is that: each of the three electrode array mounting mechanisms includes two elastic bands, and the two elastic bands are respectively fixedly installed on the top of two U-shaped sliders aligned left and right, and a hard rubber band is fixedly connected to the top of the two elastic bands.
[0010] A further improvement of this utility model is that: the hard rubber strip has several through-holes, an electrode mounting screw is installed on the inner ring of the threaded hole, an EEG signal acquisition electrode is fixedly installed at the bottom of the electrode mounting screw, and the top of the electrode mounting screw extends through to the top of the hard rubber strip and is threadedly fitted with a threaded locking cap.
[0011] A further improvement of this utility model is that the adjustment mechanism includes an adjustment belt one and an adjustment belt two. The adjustment belt one and the adjustment belt two are respectively fixedly connected to the left and right ends of the rear side of the wearable fabric headband. A number of snap buttons are fixedly installed on the right side of the adjustment belt one, and a number of snap buttons are fixedly installed on the left side of the adjustment belt two. The number of snap buttons are aligned left and right with the number of snap buttons.
[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0013] 1. This utility model provides a wearable EEG signal acquisition device with an adjustable electrode array. Through the cooperation of the moving mechanism, the U-shaped slider, and the electrode array mounting mechanism, the EEG signal acquisition electrodes can be adjusted and fixed in the front-back and left-right positions on the top of the acquisition personnel's head. This adapts to the heads of different acquisition personnel, making the acquisition position of the EEG signal acquisition electrodes more precise and improving the accuracy of EEG signal acquisition.
[0014] 2. This utility model provides a wearable EEG signal acquisition device with an adjustable electrode array. Through the cooperation between the wearable fabric headband, adjustment strap one, adjustment strap two, snap buttons, and snap buttons female, the inner diameter of the wearable fabric headband can be adjusted according to the different front and back positions of the left and right aligned snap buttons and snap buttons female. This makes it convenient for acquisition personnel with different head circumferences to wear, thus improving the applicability of the device. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the moving mechanism and the EEG signal acquisition mechanism of this utility model.
[0017] Figure 3 This is a schematic cross-sectional view of the U-shaped slider structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the electrode array mounting mechanism of this utility model.
[0019] Figure 5 This is a schematic diagram of the adjustment mechanism of the present invention.
[0020] In the diagram: 1. Wearable fabric headband; 2. Moving mechanism; 21. Hard plastic arc-shaped sliding plate; 22. Limiting slide groove; 3. EEG signal acquisition mechanism; 31. U-shaped slider; 311. Locking threaded hole; 312. Locking threaded rod; 313. Locking rotating rod; 32. Electrode array mounting mechanism; 321. Hard rubber band; 322. Elastic band; 323. Threaded hole; 324. Electrode mounting screw; 325. EEG signal acquisition electrode; 326. Threaded locking cover; 33. Resistance reducing pulley; 4. Adjustment mechanism; 41. Adjustment belt one; 42. Adjustment belt two; 43. Snap button; 44. Snap button nut. Detailed Implementation
[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0022] like Figure 1 , Figure 2 , Figure 3As shown, this utility model provides a wearable EEG signal acquisition device with an adjustable electrode array, including a wearable fabric headband 1. Movable mechanisms 2 are provided on both the left and right sides of the top of the wearable fabric headband 1. Three EEG signal acquisition mechanisms 3 are provided on the top of the two movable mechanisms 2. An adjustment mechanism 4 is provided on the rear side of the wearable fabric headband 1. Each of the two movable mechanisms 2 includes a hard plastic arc-shaped sliding plate 21, which is fixedly installed on the left and right sides of the top of the wearable fabric headband 1. Each of the two hard plastic arc-shaped sliding plates 21 has a left-right through-type limiting groove 22. The three EEG signal acquisition mechanisms 3 each include two left and right U-shaped sliders 31. An electrode array mounting mechanism 32 is provided on the top of each U-shaped slider 31. The left and right U-shaped sliders 31 are slidably connected to the two hard plastic arc slide plates 21 respectively. A drag-reducing pulley 33 is movably installed between the inner opposite surfaces of the left and right U-shaped sliders 31, and the drag-reducing pulley 33 is slidably connected to the limiting slide groove 22. The top of the three U-shaped sliders 31 on the top of the hard plastic arc slide plates 21 on the left and right sides is provided with a vertically penetrating locking thread hole 311. A locking thread rod 312 is installed on the inner thread of the locking thread hole 311. The bottom of the locking thread rod 312 overlaps with the top of the hard plastic arc slide plate 21. A locking rotating rod 313 is fixedly installed on the top of the hard plastic arc slide plate 21.
[0023] When it is necessary to adjust the front and back position of the EEG signal acquisition electrode 325, simply rotate the locking rotating rod 313. The locking threaded rod 312 and the locking threaded hole 311 will be connected by threads, which will release the pressure of the locking threaded rod 312 on the top of the hard plastic arc-shaped slide plate 21. This will allow the U-shaped slider 31 to roll in the limiting groove 22 opened in the hard plastic arc-shaped slide plate 21 to adjust its front and back position. This will drive the overall electrode array mounting mechanism 32 to adjust its position. After adjusting to the designated position, the locking rotating rod 313 can be reversed again to make the locking threaded rod 312 rotate downward in the inner circle of the locking threaded hole 311 until it presses against the top of the hard plastic arc-shaped slide plate 21, so that the U-shaped slider 31 is fixed in place.
[0024] like Figure 4 As shown, each of the three electrode array mounting mechanisms 32 includes two elastic bands 322, and the two elastic bands 322 are respectively fixedly mounted on the top of two U-shaped sliders 31 aligned left and right. The top of the two elastic bands 322 is fixedly connected to a hard rubber band 321. The hard rubber band 321 has several threaded holes 323 that pass through vertically. The inner ring of the threaded hole 323 is threaded with an electrode mounting screw 324. The bottom of the electrode mounting screw 324 is fixedly mounted with an EEG signal acquisition electrode 325. The top of the electrode mounting screw 324 extends through to the top of the hard rubber band 321 and is threaded with a threaded locking cap 326.
[0025] During data collection, the elasticity of the elastic band 322 and the flexibility of the hard rubber band 321 are utilized to allow the EEG signal acquisition electrode 325 at the bottom of the hard rubber band 321 to fit snugly against the head of the person collecting the data. When the position of the EEG signal acquisition electrode 325 needs to be adjusted, simply rotate the threaded locking cap 326 to remove it from the outer wall of the electrode mounting screw 324 at the top of the EEG signal acquisition electrode 325. This allows the EEG signal acquisition electrode 325 to disengage from the threaded hole 323 and be inserted upwards into the threaded hole 323 where the position needs to be adjusted. Then, the threaded locking cap 326 is aligned with the part of the electrode mounting screw 324 extending out of the threaded hole 323 and tightened in reverse. This re-fixes the EEG signal acquisition electrode 325 after the position adjustment, allowing the position of the EEG signal acquisition electrode 325 to be adjusted to different positions on the head of the person collecting the data, improving the accuracy of the data collection.
[0026] like Figure 5 As shown, the adjustment mechanism 4 includes an adjustment belt 1 41 and an adjustment belt 2 42. The adjustment belt 1 41 and the adjustment belt 2 42 are respectively fixedly connected to the left and right ends of the rear side of the wearable fabric headband 1. Several snap buttons 43 are fixedly installed on the right side of the adjustment belt 1, and several snap buttons 44 are fixedly installed on the left side of the adjustment belt 2 42. The several snap buttons 43 are aligned with the several snap buttons 44 on the left and right sides respectively.
[0027] When it is necessary to collect EEG signals, the wearable fabric headband 1 can be worn on the head and fastened by one pair of snap buttons 43 and snap buttons 44 on the opposite sides of the adjustment strap 1 41 and adjustment strap 2 42, so as to achieve the adaptive wearing of the wearable fabric headband 1 and make it convenient for people with different head circumferences to wear.
[0028] The working principle of this wearable EEG signal acquisition device with adjustable electrode array will be explained in detail below.
[0029] like Figure 1-5As shown, when EEG signal acquisition is required, the wearable fabric headband 1 can be worn on the head and fastened by the snap fasteners 43 and 44 on the opposite sides of the adjustment strap 41 and adjustment strap 42, thus achieving adaptive wearing of the wearable fabric headband 1, which is convenient for people with different head circumferences. At the same time, when it is necessary to adjust the front and back position of the EEG signal acquisition electrode 325, simply rotate the locking rotating rod 313. The threaded connection between the locking threaded rod 312 and the locking threaded hole 311 will release the pressure of the locking threaded rod 312 on the top of the hard plastic arc-shaped slide plate 21, allowing the U-shaped slider 31 to roll in the limiting slide groove 22 opened in the hard plastic arc-shaped slide plate 21 to adjust its front and back position using the drag-reducing pulley 33. This will drive the overall electrode array mounting mechanism 32 to adjust its position. After adjusting to the designated position, the locking rotating rod 313 can be reversed again to make the locking threaded rod 312 rotate downward in the inner circle of the locking threaded hole 311. The U-shaped slider 31 is fixed in place by pressing against the top of the hard plastic arc-shaped sliding plate 21. During data collection, the elasticity of the elastic band 322 and the flexibility of the hard rubber band 321 are utilized to ensure that the EEG signal acquisition electrode 325 at the bottom of the hard rubber band 321 fits snugly against the head of the person collecting the data. When the position of the EEG signal acquisition electrode 325 needs to be adjusted, simply rotate the threaded locking cap 326 to remove it from the outer wall of the electrode mounting screw 324 at the top of the EEG signal acquisition electrode 325. This allows the EEG signal acquisition electrode 325 to disengage from the threaded hole 323 and be inserted upwards into the threaded hole 323 where the position needs to be adjusted. Then, the threaded locking cap 326 is reversed and tightened to the part of the electrode mounting screw 324 that extends out of the threaded hole 323. This allows the EEG signal acquisition electrode 325 to be re-fixed after the position adjustment, thus enabling the position of the EEG signal acquisition electrode 325 to be adjusted to different positions on the head of the person collecting the data, improving the accuracy of the data collection.
[0030] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A wearable electroencephalogram signal acquisition device with adjustable electrode array, comprising a wearable cloth headband (1), characterized in that: The wearable cloth headband (1) is provided with a moving mechanism (2) on the top of the left and right sides, and the top of the two moving mechanisms (2) is provided with three brain electrical signal acquisition mechanisms (3); the rear side of the wearable cloth headband (1) is provided with an adjusting mechanism (4); the two moving mechanisms (2) each comprise a hard plastic circular arc slide plate (21), and the two hard plastic circular arc slide plates (21) are fixedly installed on the top of the left and right sides of the wearable cloth headband (1); the two hard plastic circular arc slide plates (21) are each provided with a left-right through limiting sliding groove (22); the three brain electrical signal acquisition mechanisms (3) each comprise two U-shaped slide blocks (31), and the top of the two U-shaped slide blocks (31) is provided with an electrode array mounting mechanism (32); and the two U-shaped slide blocks (31) are respectively and slidably connected with the two hard plastic circular arc slide plates (21). 2.The device of claim 1, wherein: The inner side opposite surfaces of the two U-shaped slide blocks (31) are movably connected with a resistance reduction pulley (33), and the resistance reduction pulley (33) is slidably connected with the limiting sliding groove (22). 3.The device of claim 1, wherein the device further comprises: a plurality of electrodes arranged in a two-dimensional array; and a plurality of electrode adjustment mechanisms, each of which is connected to one of the plurality of electrodes and configured to adjust a position of the one of the plurality of electrodes. The top of each of the three U-shaped slide blocks (31) on the top of the left and right hard plastic circular arc slide plates (21) is provided with an up-down through locking screw hole (311), and the inner ring of the locking screw hole (311) is threadedly connected with a locking screw rod (312), the bottom of the locking screw rod (312) is overlapped with the top of the hard plastic circular arc slide plate (21), and the top of the hard plastic circular arc slide plate (21) is fixedly connected with a locking rotary rod (313).
4. The device of claim 1, wherein the device is configured to adjust the electrode array based on the detected brain activity. The three electrode array mounting mechanisms (32) each comprise two elastic bands (322), and the two elastic bands (322) are fixedly installed on the top of the two U-shaped slide blocks (31) aligned in left and right directions; and the top of the two elastic bands (322) is fixedly connected with a hard rubber band (321).
5. The device of claim 4, wherein the device is configured to adjust the electrode array to a configuration that is optimal for the user. The hard rubber band (321) is provided with a plurality of up-down through screw holes (323), the inner ring of the screw hole (323) is threadedly connected with an electrode mounting screw rod (324), the bottom of the electrode mounting screw rod (324) is fixedly connected with a brain electrical signal acquisition electrode (325), and the top end of the electrode mounting screw rod (324) penetrates through the top of the hard rubber band (321) and is threadedly connected with a screw locking cover (326).
6. The device of claim 1, wherein the device is configured to be worn on a head of a subject. The adjusting mechanism (4) comprises an adjusting band one (41) and an adjusting band two (42), and the adjusting band one (41) and the adjusting band two (42) are respectively and fixedly connected with the left and right ends of the rear side of the wearable cloth headband (1); a plurality of snap button buckles (43) are fixedly installed on the right side of the adjusting band one (41); a plurality of snap button female buckles (44) are fixedly installed on the left side of the adjusting band two (42); and the plurality of snap button buckles (43) are aligned in left and right directions with the plurality of snap button female buckles (44).